/*
 * Copyright (C) 2008 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.gogowan.agroenterprise.barcode;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Collection;
import java.util.EnumSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.PreferenceManager;
import android.text.ClipboardManager;
import android.text.TextUtils;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.gogowan.agroenterprise.R;
import com.gogowan.agroenterprise.barcode.camera.CameraManager;
import com.gogowan.agroenterprise.barcode.history.HistoryActivity;
import com.gogowan.agroenterprise.barcode.history.HistoryItem;
import com.gogowan.agroenterprise.barcode.history.HistoryManager;
import com.gogowan.agroenterprise.barcode.result.ResultHandler;
import com.gogowan.agroenterprise.barcode.result.ResultHandlerFactory;
import com.gogowan.agroenterprise.model.CodeInfoResult;
import com.gogowan.agroenterprise.utils.Utils;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;
import com.google.zxing.ResultMetadataType;
import com.google.zxing.ResultPoint;

/**
 * This activity opens the camera and does the actual scanning on a background
 * thread. It draws a viewfinder to help the user place the barcode correctly,
 * shows feedback as the image processing is happening, and then overlays the
 * results when a scan is successful.
 * 
 * @author dswitkin@google.com (Daniel Switkin)
 * @author Sean Owen
 */
public final class CaptureActivity extends Activity implements SurfaceHolder.Callback {

	private static final String TAG = CaptureActivity.class.getSimpleName();
	/**
	 * 是否连续扫码
	 */
	public static boolean ISBULKMODE = false;
	private static final int SHARE_ID = Menu.FIRST;
	private static final int HISTORY_ID = Menu.FIRST + 1;
	private static final int SETTINGS_ID = Menu.FIRST + 2;
	private static final int HELP_ID = Menu.FIRST + 3;
	private static final int ABOUT_ID = Menu.FIRST + 4;

	private static final long DEFAULT_INTENT_RESULT_DURATION_MS = 1500L;
	private static final long BULK_MODE_SCAN_DELAY_MS = 1000L;

	private static final String PACKAGE_NAME = "com.google.zxing.client.android";
	private static final String PRODUCT_SEARCH_URL_PREFIX = "http://www.google";
	private static final String PRODUCT_SEARCH_URL_SUFFIX = "/m/products/scan";
	private static final String[] ZXING_URLS = { "http://zxing.appspot.com/scan", "zxing://scan/" };
	private static final String RETURN_CODE_PLACEHOLDER = "{CODE}";
	private static final String RETURN_URL_PARAM = "ret";

	public static final int HISTORY_REQUEST_CODE = 0x0000bacc;

	private static final Set<ResultMetadataType> DISPLAYABLE_METADATA_TYPES = EnumSet.of(
			ResultMetadataType.ISSUE_NUMBER, ResultMetadataType.SUGGESTED_PRICE,
			ResultMetadataType.ERROR_CORRECTION_LEVEL, ResultMetadataType.POSSIBLE_COUNTRY);

	private CameraManager cameraManager;
	private CaptureActivityHandler handler;
	private Result savedResultToShow;
	private ViewfinderView viewfinderView;
	private TextView statusView;
	private View resultView;
	private Result lastResult;
	private boolean hasSurface;
	private boolean copyToClipboard;
	private IntentSource source;
	private String sourceUrl;
	private String returnUrlTemplate;
	private Collection<BarcodeFormat> decodeFormats;
	private String characterSet;
	private String versionName;
	private HistoryManager historyManager;
	private InactivityTimer inactivityTimer;
	private BeepManager beepManager;
	// 判断是由哪个界面跳转过来的 1代表销售 2 代表巡检、作业
	private int type;
	private TextView ScanCount_Tv;
	private boolean onTik = false;
	/**
	 * 是否连续扫码
	 */
	private boolean isBulkMode;
	private String emptyCode;
	private String emptyCode1;
	// 已扫过的全部码
	private ArrayList<String> scandatas = new ArrayList<>();
	private ArrayList<String> codeList = new ArrayList<String>();
	private final DialogInterface.OnClickListener aboutListener = new DialogInterface.OnClickListener() {
		@Override
		public void onClick(DialogInterface dialogInterface, int i) {
			Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.zxing_url)));
			intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
			startActivity(intent);
		}
	};

	ViewfinderView getViewfinderView() {
		return viewfinderView;
	}

	public Handler getHandler() {
		return handler;
	}

	CameraManager getCameraManager() {
		return cameraManager;
	}

	@Override
	public void onCreate(Bundle icicle) {
		super.onCreate(icicle);

		// Window window = getWindow();
		// window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
		setContentView(R.layout.bc_capture);

		hasSurface = false;
		historyManager = new HistoryManager(this);
		historyManager.trimHistory();
		inactivityTimer = new InactivityTimer(this);
		beepManager = new BeepManager(this);
		type = getIntent().getIntExtra("type", -1);
		PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
		// showHelpOnFirstLaunch();
		ScanCount_Tv=(TextView)findViewById(R.id.ScanActivity_down_tv);
		// 完成
		isBulkMode = getIntent().getBooleanExtra(Intents.Scan.IS_BULT_MODE, false);
		if (isBulkMode) {
			Button wcBtn = (Button) findViewById(R.id.capture_wancheng_btn);
			wcBtn.setVisibility(View.VISIBLE);
			wcBtn.setOnClickListener(new View.OnClickListener() {

				@Override
				public void onClick(View v) {
					// TODO Auto-generated method stub
					handleDecodeExternallyList();
				}
			});
		}
		emptyCode = getIntent().getStringExtra("emptyCode");
		if (emptyCode == null) {
			emptyCode = "";
		}
		emptyCode1 = getIntent().getStringExtra("emptyCode1");
		if (emptyCode1 == null) {
			emptyCode1 = "";
		}
		emptyCode = Utils.getCodeStr(emptyCode);
		emptyCode1 = Utils.getCodeStr(emptyCode1);
		List<String> list = getIntent().getStringArrayListExtra("scans");
		if (list != null && list.size() > 0) {
			scandatas.addAll(list);
		}
	}

	@Override
	protected void onResume() {
		super.onResume();

		// CameraManager must be initialized here, not in onCreate(). This is
		// necessary because we don't
		// want to open the camera driver and measure the screen size if we're
		// going to show the help on
		// first launch. That led to bugs where the scanning rectangle was the
		// wrong size and partially
		// off screen.
		cameraManager = new CameraManager(getApplication());

		viewfinderView = (ViewfinderView) findViewById(R.id.viewfinder_view);
		viewfinderView.setCameraManager(cameraManager);

		resultView = findViewById(R.id.result_view);
		statusView = (TextView) findViewById(R.id.status_view);

		handler = null;
		lastResult = null;

		resetStatusView();

		SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
		SurfaceHolder surfaceHolder = surfaceView.getHolder();
		if (hasSurface) {
			// The activity was paused but not stopped, so the surface still
			// exists. Therefore
			// surfaceCreated() won't be called, so init the camera here.
			initCamera(surfaceHolder);
		} else {
			// Install the callback and wait for surfaceCreated() to init the
			// camera.
			surfaceHolder.addCallback(this);
			surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
		}

		beepManager.updatePrefs();

		inactivityTimer.onResume();

		Intent intent = getIntent();

		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
		copyToClipboard = prefs.getBoolean(PreferencesActivity.KEY_COPY_TO_CLIPBOARD, true)
				&& (intent == null || intent.getBooleanExtra(Intents.Scan.SAVE_HISTORY, true));

		source = IntentSource.NONE;
		decodeFormats = null;
		characterSet = null;

		if (intent != null) {

			String action = intent.getAction();
			String dataString = intent.getDataString();

			if (Intents.Scan.ACTION.equals(action)) {

				// Scan the formats the intent requested, and return the result
				// to the calling activity.
				source = IntentSource.NATIVE_APP_INTENT;
				decodeFormats = DecodeFormatManager.parseDecodeFormats(intent);

				if (intent.hasExtra(Intents.Scan.WIDTH) && intent.hasExtra(Intents.Scan.HEIGHT)) {
					int width = intent.getIntExtra(Intents.Scan.WIDTH, 0);
					int height = intent.getIntExtra(Intents.Scan.HEIGHT, 0);
					if (width > 0 && height > 0) {
						cameraManager.setManualFramingRect(width, height);
					}
				}

				String customPromptMessage = intent.getStringExtra(Intents.Scan.PROMPT_MESSAGE);
				if (customPromptMessage != null) {
					statusView.setText(customPromptMessage);
				}

			} else if (dataString != null && dataString.contains(PRODUCT_SEARCH_URL_PREFIX)
					&& dataString.contains(PRODUCT_SEARCH_URL_SUFFIX)) {

				// Scan only products and send the result to mobile Product
				// Search.
				source = IntentSource.PRODUCT_SEARCH_LINK;
				sourceUrl = dataString;
				decodeFormats = DecodeFormatManager.PRODUCT_FORMATS;

			} else if (isZXingURL(dataString)) {

				// Scan formats requested in query string (all formats if none
				// specified).
				// If a return URL is specified, send the results there.
				// Otherwise, handle it ourselves.
				source = IntentSource.ZXING_LINK;
				sourceUrl = dataString;
				Uri inputUri = Uri.parse(sourceUrl);
				returnUrlTemplate = inputUri.getQueryParameter(RETURN_URL_PARAM);
				decodeFormats = DecodeFormatManager.parseDecodeFormats(inputUri);

			}

			characterSet = intent.getStringExtra(Intents.Scan.CHARACTER_SET);

		}
	}

	private static boolean isZXingURL(String dataString) {
		if (dataString == null) {
			return false;
		}
		for (String url : ZXING_URLS) {
			if (dataString.startsWith(url)) {
				return true;
			}
		}
		return false;
	}

	@Override
	protected void onPause() {
		if (handler != null) {
			handler.quitSynchronously();
			handler = null;
		}
		inactivityTimer.onPause();
		cameraManager.closeDriver();
		if (!hasSurface) {
			SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
			SurfaceHolder surfaceHolder = surfaceView.getHolder();
			surfaceHolder.removeCallback(this);
		}
		super.onPause();
	}

	@Override
	protected void onDestroy() {
		inactivityTimer.shutdown();
		super.onDestroy();
	}

	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		if (keyCode == KeyEvent.KEYCODE_BACK) {
			if (source == IntentSource.NATIVE_APP_INTENT) {
				setResult(RESULT_CANCELED);
				finish();
				return true;
			} else if ((source == IntentSource.NONE || source == IntentSource.ZXING_LINK) && lastResult != null) {
				restartPreviewAfterDelay(0L);
				return true;
			}
		} else if (keyCode == KeyEvent.KEYCODE_FOCUS || keyCode == KeyEvent.KEYCODE_CAMERA) {
			// Handle these events so they don't launch the Camera app
			return true;
		}
		return super.onKeyDown(keyCode, event);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		super.onCreateOptionsMenu(menu);
		menu.add(Menu.NONE, SHARE_ID, Menu.NONE, R.string.menu_share).setIcon(android.R.drawable.ic_menu_share);
		menu.add(Menu.NONE, HISTORY_ID, Menu.NONE, R.string.menu_history)
				.setIcon(android.R.drawable.ic_menu_recent_history);
		menu.add(Menu.NONE, SETTINGS_ID, Menu.NONE, R.string.menu_settings)
				.setIcon(android.R.drawable.ic_menu_preferences);
		menu.add(Menu.NONE, HELP_ID, Menu.NONE, R.string.menu_help).setIcon(android.R.drawable.ic_menu_help);
		menu.add(Menu.NONE, ABOUT_ID, Menu.NONE, R.string.menu_about).setIcon(android.R.drawable.ic_menu_info_details);
		return false;
	}

	// Don't display the share menu item if the result overlay is showing.
	@Override
	public boolean onPrepareOptionsMenu(Menu menu) {
		super.onPrepareOptionsMenu(menu);
		menu.findItem(SHARE_ID).setVisible(lastResult == null);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		Intent intent = new Intent(Intent.ACTION_VIEW);
		intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
		switch (item.getItemId()) {
		case SHARE_ID:
			// intent.setClassName(this, ShareActivity.class.getName());
			// startActivity(intent);
			break;
		case HISTORY_ID:
			intent = new Intent(Intent.ACTION_VIEW);
			intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
			intent.setClassName(this, HistoryActivity.class.getName());
			startActivityForResult(intent, HISTORY_REQUEST_CODE);
			break;
		case SETTINGS_ID:
			intent.setClassName(this, PreferencesActivity.class.getName());
			startActivity(intent);
			break;
		case HELP_ID:
			intent.setClassName(this, HelpActivity.class.getName());
			startActivity(intent);
			break;
		case ABOUT_ID:
			AlertDialog.Builder builder = new AlertDialog.Builder(this);
			builder.setTitle(getString(R.string.title_about) + versionName);
			builder.setMessage(getString(R.string.msg_about) + "\n\n" + getString(R.string.zxing_url));
			builder.setIcon(R.drawable.logo);
			builder.setPositiveButton(R.string.button_open_browser, aboutListener);
			builder.setNegativeButton(R.string.button_cancel, null);
			builder.show();
			break;
		default:
			return super.onOptionsItemSelected(item);
		}
		return true;
	}

	@Override
	public void onActivityResult(int requestCode, int resultCode, Intent intent) {
		if (resultCode == RESULT_OK) {
			if (requestCode == HISTORY_REQUEST_CODE) {
				int itemNumber = intent.getIntExtra(Intents.History.ITEM_NUMBER, -1);
				if (itemNumber >= 0) {
					HistoryItem historyItem = historyManager.buildHistoryItem(itemNumber);
					decodeOrStoreSavedBitmap(null, historyItem.getResult());
				}
			}
		}
	}

	private void decodeOrStoreSavedBitmap(Bitmap bitmap, Result result) {
		// Bitmap isn't used yet -- will be used soon
		if (handler == null) {
			savedResultToShow = result;
		} else {
			if (result != null) {
				savedResultToShow = result;
			}
			if (savedResultToShow != null) {
				Message message = Message.obtain(handler, R.id.decode_succeeded, savedResultToShow);
				handler.sendMessage(message);
			}
			savedResultToShow = null;
		}
	}

	@Override
	public void surfaceCreated(SurfaceHolder holder) {
		if (holder == null) {
			Log.e(TAG, "*** WARNING *** surfaceCreated() gave us a null surface!");
		}
		if (!hasSurface) {
			hasSurface = true;
			initCamera(holder);
		}
	}

	@Override
	public void surfaceDestroyed(SurfaceHolder holder) {
		hasSurface = false;
	}

	@Override
	public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {

	}

	/**
	 * A valid barcode has been found, so give an indication of success and show
	 * the results.
	 * 
	 * @param rawResult
	 *            The contents of the barcode.
	 * @param barcode
	 *            A greyscale bitmap of the camera data which was decoded.
	 */
	public void handleDecode(Result rawResult, Bitmap barcode) {
		inactivityTimer.onActivity();
		lastResult = rawResult;
		ResultHandler resultHandler = ResultHandlerFactory.makeResultHandler(this, rawResult);
		historyManager.addHistoryItem(rawResult, resultHandler);

		if (barcode == null) {
			// This is from history -- no saved barcode
		} else {
			beepManager.playBeepSoundAndVibrate();
			drawResultPoints(barcode, rawResult);
			switch (source) {
			case NATIVE_APP_INTENT:
				if (!rawResult.getText().contains("s.idcode.org.cn")){
					// 是否批量扫描

					if (isBulkMode) {

						if (TextUtils.isEmpty(rawResult.getText())) {

						} else if (emptyCode.trim().equals(Utils.getCodeStr(rawResult.getText().trim()))
								|| emptyCode1.trim().equals(Utils.getCodeStr(rawResult.getText().trim()))) {
							Toast.makeText(getApplicationContext(), "码号重复", Toast.LENGTH_SHORT).show();
						} else {
							if (!(Utils.getCodeStr(rawResult.getText().trim()) + "").startsWith("MA.156.M0")) {
								restartPreviewAfterDelay(BULK_MODE_SCAN_DELAY_MS);
								return;
							}
							for (String s : scandatas) {
								if (TextUtils.equals((Utils.getCodeStr(rawResult.getText().trim())), s)) {
									Toast.makeText(getApplicationContext(), "码号重复", Toast.LENGTH_SHORT).show();
									restartPreviewAfterDelay(BULK_MODE_SCAN_DELAY_MS);
									return;
								}
							}
							Toast.makeText(getApplicationContext(), rawResult.getText().trim() + "", Toast.LENGTH_SHORT)
									.show();
							// Wait a moment or else it will scan the same barcode
							// continuously about 3 times

							scandatas.add(0,Utils.getCodeStr(rawResult.getText().trim()) + "");
							codeList.add(0,Utils.getCodeStr(rawResult.getText().trim()) + "");
							ScanCount_Tv.setText("已扫:"+codeList.size()+"个码");
						}
						restartPreviewAfterDelay(BULK_MODE_SCAN_DELAY_MS);
					} else {
						// handleDecodeInternally(rawResult, resultHandler,
						// barcode);
						if (TextUtils.isEmpty(rawResult.getText())) {
						} else if (TextUtils.isEmpty(Utils.getCodeStr(rawResult.getText()))) {
							restartPreviewAfterDelay(BULK_MODE_SCAN_DELAY_MS);
						} else if (emptyCode.trim().equals(Utils.getCodeStr(rawResult.getText().trim()))
								|| emptyCode1.trim().equals(Utils.getCodeStr(rawResult.getText().trim()))) {
							Toast.makeText(getApplicationContext(), "码号重复", Toast.LENGTH_SHORT).show();
							restartPreviewAfterDelay(BULK_MODE_SCAN_DELAY_MS);
						} else {
							handleDecodeExternally(rawResult, resultHandler, barcode);
						}
					}
				}

			case PRODUCT_SEARCH_LINK:
				break;
			case ZXING_LINK:
				break;
			case NONE:
				SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
				if (prefs.getBoolean(PreferencesActivity.KEY_BULK_MODE, false)) {
					Toast.makeText(this, R.string.msg_bulk_mode_scanned, Toast.LENGTH_SHORT).show();
					// Wait a moment or else it will scan the same barcode
					// continuously about 3 times
					restartPreviewAfterDelay(BULK_MODE_SCAN_DELAY_MS);
				} else {

				}
				break;
			}
		}
	}

	/**
	 * Superimpose a line for 1D or dots for 2D to highlight the key features of
	 * the barcode.
	 * 
	 * @param barcode
	 *            A bitmap of the captured image.
	 * @param rawResult
	 *            The decoded results which contains the points to draw.
	 */
	private void drawResultPoints(Bitmap barcode, Result rawResult) {
		ResultPoint[] points = rawResult.getResultPoints();
		if (points != null && points.length > 0) {
			Canvas canvas = new Canvas(barcode);
			Paint paint = new Paint();
			paint.setColor(getResources().getColor(R.color.result_image_border));
			paint.setStrokeWidth(3.0f);
			paint.setStyle(Paint.Style.STROKE);
			Rect border = new Rect(2, 2, barcode.getWidth() - 2, barcode.getHeight() - 2);
			canvas.drawRect(border, paint);

			paint.setColor(getResources().getColor(R.color.result_points));
			if (points.length == 2) {
				paint.setStrokeWidth(4.0f);
				drawLine(canvas, paint, points[0], points[1]);
			} else if (points.length == 4 && (rawResult.getBarcodeFormat() == BarcodeFormat.UPC_A
					|| rawResult.getBarcodeFormat() == BarcodeFormat.EAN_13)) {
				// Hacky special case -- draw two lines, for the barcode and
				// metadata
				drawLine(canvas, paint, points[0], points[1]);
				drawLine(canvas, paint, points[2], points[3]);
			} else {
				paint.setStrokeWidth(10.0f);
				for (ResultPoint point : points) {
					canvas.drawPoint(point.getX(), point.getY(), paint);
				}
			}
		}
	}

	// Briefly show the contents of the barcode, then handle the result outside
	// Barcode Scanner.
	private void handleDecodeExternally(Result rawResult, ResultHandler resultHandler, Bitmap barcode) {
		viewfinderView.drawResultBitmap(barcode);

		// Since this message will only be shown for a second, just tell the
		// user what kind of
		// barcode was found (e.g. contact info) rather than the full contents,
		// which they won't
		// have time to read.
		// statusView.setText(getString(resultHandler.getDisplayTitle()));

		if (copyToClipboard && !resultHandler.areContentsSecure()) {
			ClipboardManager clipboard = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
			clipboard.setText(resultHandler.getDisplayContents());
		}

		if (source == IntentSource.NATIVE_APP_INTENT) {

			// Hand back whatever action they requested - this can be changed to
			// Intents.Scan.ACTION when
			// the deprecated intent is retired.
			Intent intent = new Intent(getIntent().getAction());
			intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
			intent.putExtra(Intents.Scan.RESULT, rawResult.toString());
			intent.putExtra(Intents.Scan.RESULT_FORMAT, rawResult.getBarcodeFormat().toString());
			byte[] rawBytes = rawResult.getRawBytes();
			if (rawBytes != null && rawBytes.length > 0) {
				intent.putExtra(Intents.Scan.RESULT_BYTES, rawBytes);
			}
			Map<ResultMetadataType, ?> metadata = rawResult.getResultMetadata();
			if (metadata != null) {
				Integer orientation = (Integer) metadata.get(ResultMetadataType.ORIENTATION);
				if (orientation != null) {
					intent.putExtra(Intents.Scan.RESULT_ORIENTATION, orientation.intValue());
				}
				String ecLevel = (String) metadata.get(ResultMetadataType.ERROR_CORRECTION_LEVEL);
				if (ecLevel != null) {
					intent.putExtra(Intents.Scan.RESULT_ERROR_CORRECTION_LEVEL, ecLevel);
				}
				Iterable<byte[]> byteSegments = (Iterable<byte[]>) metadata.get(ResultMetadataType.BYTE_SEGMENTS);
				if (byteSegments != null) {
					int i = 0;
					for (byte[] byteSegment : byteSegments) {
						intent.putExtra(Intents.Scan.RESULT_BYTE_SEGMENTS_PREFIX + i, byteSegment);
						i++;
					}
				}
			}
			sendReplyMessage(R.id.return_scan_result, intent);

		} else if (source == IntentSource.PRODUCT_SEARCH_LINK) {

			// Reformulate the URL which triggered us into a query, so that the
			// request goes to the same
			// TLD as the scan URL.
			int end = sourceUrl.lastIndexOf("/scan");
			String replyURL = sourceUrl.substring(0, end) + "?q=" + resultHandler.getDisplayContents()
					+ "&source=zxing";
			sendReplyMessage(R.id.launch_product_query, replyURL);

		} else if (source == IntentSource.ZXING_LINK) {

			// Replace each occurrence of RETURN_CODE_PLACEHOLDER in the
			// returnUrlTemplate
			// with the scanned code. This allows both queries and REST-style
			// URLs to work.
			if (returnUrlTemplate != null) {
				String codeReplacement = String.valueOf(resultHandler.getDisplayContents());
				try {
					codeReplacement = URLEncoder.encode(codeReplacement, "UTF-8");
				} catch (UnsupportedEncodingException e) {
					// can't happen; UTF-8 is always supported. Continue, I
					// guess, without encoding
				}
				String replyURL = returnUrlTemplate.replace(RETURN_CODE_PLACEHOLDER, codeReplacement);
				sendReplyMessage(R.id.launch_product_query, replyURL);
			}

		}
	}

	private static void drawLine(Canvas canvas, Paint paint, ResultPoint a, ResultPoint b) {
		canvas.drawLine(a.getX(), a.getY(), b.getX(), b.getY(), paint);
	}

	private void sendReplyMessage(int id, Object arg) {
		Message message = Message.obtain(handler, id, arg);
		long resultDurationMS = getIntent().getLongExtra(Intents.Scan.RESULT_DISPLAY_DURATION_MS,
				DEFAULT_INTENT_RESULT_DURATION_MS);
		if (resultDurationMS > 0L) {
			handler.sendMessageDelayed(message, resultDurationMS);
		} else {
			handler.sendMessage(message);
		}
	}

	/**
	 * We want the help screen to be shown automatically the first time a new
	 * version of the app is run. The easiest way to do this is to check
	 * android:versionCode from the manifest, and compare it to a value stored
	 * as a preference.
	 */
	private boolean showHelpOnFirstLaunch() {
		try {
			PackageInfo info = getPackageManager().getPackageInfo(PACKAGE_NAME, 0);
			int currentVersion = info.versionCode;
			// Since we're paying to talk to the PackageManager anyway, it makes
			// sense to cache the app
			// version name here for display in the about box later.
			this.versionName = info.versionName;
			SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
			int lastVersion = prefs.getInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, 0);
			if (currentVersion > lastVersion) {
				prefs.edit().putInt(PreferencesActivity.KEY_HELP_VERSION_SHOWN, currentVersion).commit();
				Intent intent = new Intent(this, HelpActivity.class);
				intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
				// Show the default page on a clean install, and the what's new
				// page on an upgrade.
				String page = lastVersion == 0 ? HelpActivity.DEFAULT_PAGE : HelpActivity.WHATS_NEW_PAGE;
				intent.putExtra(HelpActivity.REQUESTED_PAGE_KEY, page);
				startActivity(intent);
				return true;
			}
		} catch (PackageManager.NameNotFoundException e) {
			Log.w(TAG, e);
		}
		return false;
	}

	private void initCamera(SurfaceHolder surfaceHolder) {
		try {
			cameraManager.openDriver(surfaceHolder);
			// Creating the handler starts the preview, which can also throw a
			// RuntimeException.
			if (handler == null) {
				handler = new CaptureActivityHandler(this, decodeFormats, characterSet, cameraManager);
			}
			decodeOrStoreSavedBitmap(null, null);
		} catch (IOException ioe) {
			Log.w(TAG, ioe);
			displayFrameworkBugMessageAndExit();
		} catch (RuntimeException e) {
			// Barcode Scanner has seen crashes in the wild of this variety:
			// java.?lang.?RuntimeException: Fail to connect to camera service
			Log.w(TAG, "Unexpected error initializing camera", e);
			displayFrameworkBugMessageAndExit();
		}
	}

	private void displayFrameworkBugMessageAndExit() {
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setTitle(getString(R.string.app_name));
		builder.setMessage(getString(R.string.msg_camera_framework_bug));
		builder.setPositiveButton(R.string.button_ok, new FinishListener(this));
		builder.setOnCancelListener(new FinishListener(this));
		builder.show();
	}

	public void restartPreviewAfterDelay(long delayMS) {
		if (handler != null) {
			handler.sendEmptyMessageDelayed(R.id.restart_preview, delayMS);
		}
		resetStatusView();
	}

	private void resetStatusView() {
		resultView.setVisibility(View.GONE);
		if (type == 1) {
			statusView.setText(R.string.sales_msg_default_status);
		} else if (type == 2) {
			statusView.setText(R.string.operation_msg_default_status);
		} else {
			statusView.setText(R.string.msg_default_status);
		}
		statusView.setVisibility(View.VISIBLE);
		viewfinderView.setVisibility(View.VISIBLE);
		lastResult = null;
	}

	public void drawViewfinder() {
		viewfinderView.drawViewfinder();
	}

	// 批量扫描返回list.
	private void handleDecodeExternallyList() {
		if (onTik) {
			return;
		}
		onTik = true;
		if (source == IntentSource.NATIVE_APP_INTENT) {
			Intent intent = new Intent(getIntent().getAction());
			intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
			intent.putStringArrayListExtra(Intents.Scan.RESULTLIST, codeList);
			sendReplyMessage(R.id.return_scan_result, intent);
		}
	}
}
